Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
tion of the lever of the first class, and, being constant in itsaction, it is sometimes called the perpetual lever. It consists of acylinder, termed the axle, connected with a wlieel of much greaterdiameter. The power is applied to the circumference of the wheel(usually by means of an endless… … arm, equal to the radius of the axle, as shown; then, as the conditions of equilibrium, we shall have, of course, W X radius of the axle = P X radius of the wheel; or, 24 X 3 :: 6 X 8.P. is to W. as radius of axle is to radius of ivheel; or, 6 : 24 :: 2 : 8.The power and weight are inversely as…
Physics · Astronomy
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